A section of octagonal tower wall with, to the left, a fine, round, three-storey and platform-topped dungeon are all that remain of the fortress rebuilt in the 12C and 13C.

The 16C building has a portal with two entrances, separated by a central pillar. The slim spire tops a square tower. Inside, you can see a stained-glass window dedicated to the story of St. John the Baptist and stalls from Valasse abbey.

It dates back to the 1C, but was remodelled and extended in the 2C. You can get a good overview of the edifice from Place Félix-Faure. The main arena has the usual shape of such buildings in North-Western Gaul. The crowd occupied the terraces of the ..

This folklore museum displays artifacts, furniture and documents relating to the history of Lillebonne and Normandy. In a local archeology collection, you can see an incineration tomb, pottery and pieces of iron work (1C and 3C).